Welcome to Ventyd

Ventyd is a TypeScript-first event sourcing library that makes it easy to build applications where every state change is captured as an immutable event.

Why Ventyd?

Traditional applications only store the current state of your data. Ventyd takes a different approach - it stores all the events that led to the current state, giving you superpowers like complete audit trails, time travel debugging, and event replay.

Type-Safe

Full TypeScript support with comprehensive type inference. Catch errors at compile time.

Flexible Schema

Use Valibot, Zod, ArkType, TypeBox, or any Standard Schema library.

Any Database

Simple adapter interface works with MongoDB, PostgreSQL, MySQL, or custom solutions.

Extensible

Plugin system for analytics, logging, notifications, and custom side effects.

How It Works

Ventyd follows a simple pattern:

Define your schema - Describe your events and state using a validation library
Create a reducer - Define how events transform your state
Build your entity - Add business logic as methods
Set up storage - Connect to your database with an adapter
Use it! - Create, update, and query your entities